for item 2 - Plain Text screen of some FTP directory,
for example, one at the Microsoft FTP site -ftp://ftp.microsoft.com/.You can use any other FTP directory screen for this.

for items 2 and 3
(and for general Cyrillic testing) - Test Pages that I constructed -
in KOI8-R and CP-1251 coding.
(These pages are in Russian, so you need to use some other pages if you
test a non-Russian Cyrillic fonts).

These pages allow to test both Proportional
and Fixed fonts.
You can read these examples in one of the following sites:

Appendix 2. Modifying Netscape.INI file of Netscape 2,3
to use a font of your choice as a Fixed font

Read the following instructions only if you

want to use non-Russian Cyrillic fonts, for example Bulgarian,
and your Fixed font is not selectable in Netscapeor

don't like Fixed fonts that I suggest and like
your Proportional font so much
that you want to use it not only for HTML pages, but also for
Plain Text screens, that is to use it as a Fixed
font also.
(I don't recommend it - Fixed fonts
should be used as Netscape's Fixed fonts, not Proportional,
if you have a choice !)

To use your Proportional font both as a Proportional and as a Fixed
font in Netscape, you must modify file Netscape.INI
located in your C:\NETSCAPE directory.

Let's assume that you want to use CP-1251 font 'ER Bukinist 1251'
both as your Proportional and Fixed font. Do the following first:

This will result in appearing of 2 additional lines at the
very bottom of Netscape.INI file - [INTL] section.

NOTE: This section does not exist
initially, when you just install Netscape and use its default fonts.
It appears only if you switch to your
fonts in Options/Preferences/Fonts dialog.

Now you need to open Netscape.INI file, for example
using NOTEPAD editor in Windows, and replace existing Fixed
font in corresponding line of [INTL] section with yours(see example below).
Netscape lists Proportional font first, then
Fixed font in the line you will see below.
'Courier New' is a default font used by Netscape as a Fixed font.

The following example is for Netscape 1.

What you see when you open NETSCAPE.INI file :

[INTL]
Font0=iso-8859-1,ER Bukinist 1251,12,Courier New,10

How it looks after you replaced a Fixed font there :

[INTL]
Font0=iso-8859-1,ER Bukinist 1251,12,ER Bukinist 1251,10

Now, when you call Netscape again, you will have your font both as
a Proportional font and as a Fixed font.
You will be able to read Plain Text pages using this
font, as well as HTML pages.

NOTE: Remember, if you choose later some Fixed font
for the same Encoding in theChoose Fixed Font dialog,
then you must repeat this Netscape.INI procedure again !

Appendix 3. Modifying your Fixed font for Netscape

You can modify a Fixed font of your choice to make it work in Netscape,
but it requires more knowledge about PC applications.

You can read the corresponding instruction, with the title
"How to make your fixed KOI8-R font visible from Fonts menu (for programmers only)"
at the very bottom of the following page by A.Chernov:
'About Netscape 3'.